Since my friend has ordered this, I have a Packerl ordered the same.
The star to "activate" is mega easy. Just keep Unters light. Too close not really, because otherwise you have dark spots!
I have it glued to the ceiling and shine even after a short charging time, ie ner lamp or the light of day very strong. I habs not yet accurately measured, but a 15-minute light darken least to complete.
I have unfortunately made the mistake that I have stuck to close to each other because I thought that would make it look otherwise not good ... but they blur if you stuck too close. Therefore, rather less and rebonding you can always. Even if it ladder up and down and light on and off is stressful, it's class!
The only when you unpack the sticker, it stinks a lot like plastic. However, after activating the smell is gone.
I love this wall sticker, so if you're reading this and you are unsure, buy! Honest!
